CHSJ

Curr Health Sci J, vol. 36, no. 3, 2010

The Role Of Urinary Tract Obstruction In Occurrence Of Renal Failure

[Original paper]

Alina-Gabriela Pauna

Department of Nephrology, “St. John” Emergency Hospital, Bucharest”


Abstract:

Urinary lithiasis is a condition characterized by the formation of concretions or calculi inside the urinary tract, after precipitation of substances, which normally are dissolved in urine. Obstructive renal failure occurs because of urinary flow obstruction under a normal renal perfusion and the absence of renal parenchymal lesions. Usually, prompt correction of the cause lead to restoration of renal function. Were followed 75 patients with urinary tract obstruction and obstructive renal failure (38 men and 27 women) hospitalized in the Nephrology Clinic, “St. John” Emergency Hospital, Bucharest, in 2006–2009. Of these, 61 had ureteral obstruction and 14 had obstruction by compression or tumor invasion. The following tests were performed: simple renal radiography revealed radiopaque calculi in 12 cases; ultrasonography was performed in all patients and showed parenchymatous index reduced below 5 mm in eight patients and pyelocaliceal grade II–III expansion in 48 cases and grade IV–V in 25 cases. Doppler ultrasound: could not calculate the resistance index in the eight cases with parenchymatous index decreased (under 5 mm) and the 65/75 cases had resistance index (RI) >0.70. Only 23 of 61 patients had spontaneous kidney stone removed, in three patients with calculi between 0.8–1.5 cm located in upper ureteric was performed ESWL (extracorporeal shock wave lithotrypsy) and 35 cases requiring calculus fragmentation by ureteroscopy procedure and mounting Cook probes.


Keywords: urinary obstruction, chronic renal failure, Duplex Doppler ultrasonography, resistivity index



Corresponding: Alina-Gabriela Pauna, MD, Nephrology Specialist, PhD, Department of Nephrology, "St. John" Emergency Hospital, 13 Vitan-BArzesti Highroad, Sector 4, 042122 Bucharest, Romania; Phone +4021-334 50 75, Fax +4021-334 59 70, e-mail: alina.pauna76@yahoo.co.uk


DOI 10.12865/CHSJ.36.03.05 - Download PDF
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